flat-four engine

例句：

1. 1. The new car has a flat-four engine that provides excellent performance.
   这款新车搭载了一台平四引擎，性能卓越。
2. 2. The flat-four engine is the most common type of internal combustion engine.
   平四引擎是最常见的内燃机类型。
3. 3. Flat-four engines are known for their efficiency and reliability.
   平四引擎以其效率和可靠性而闻名。